Niš Constantine the Great Airport

Niš Constantine the Great Airport carries the IATA code INI — the three letters printed on boarding passes and baggage tags — and the ICAO code LYNI, used in flight plans and by air traffic control. It serves Niš, Serbia.

IATA codes are assigned by the International Air Transport Association for passenger-facing use; the four-letter ICAO code encodes region and country and belongs to the operational side of aviation.